22 MUSCI. (MOSSES.) 
* * Diacious: stems tomentose; capsule erect 
12. D. montanum, Hedw. Compactly cespitose ; leaves bright-gr-en 
soft, oe rather secund, crisped when dry, lanceolate-subulate, serrate on the 
margin, papillose on the back at the apex; costa strong, percurrent ; cap- 
sule aioe suleate when dry ; annulus double. — On trunks of trees, Goat Isl- 
13. D. flagellare, Hedw. Near the last species, but distinct by its nv 
merous fragile and short erect flagellx, furnished with minute appressed lanceo- 
late ecostate leaves ; stem-leaves greenish-yellow, more falcate-secund ; the ca 
sule longer and narrower. — On decayed logs in woods; very common. (Eu.) 
14. D. interraiptum, Br. & Sch. Stems 1/-2/ high; leaves _ 
secund-falcate, or spreading every way, flexuous, subulately attenuated from 
lanceolate base; costa broad, predominant, denticulate at the apex; ta 
eylindrical, annulate, dark brown, — On rocks in mountain districts. — A rather 
h, 
0 
formly atten Sekai _ costa, a on the margins 
and the back at A apex ; capsule ylind Shaded rocks, Alle- 
ghany Mountains. (Enu.) 
* * * Diecious ; stems tomentose: capsule incurved-cernuous. 
16. D. scoparium, Loosely cxespitose; stems 2’-4! high; leaves 
secund or falcate-secund, = LR carinate-concaye, serrate at the 
apex ; costa with prominent ridges at the back, dentate above ; gre cylin- 
drical, slightly cernuous.— Var. PALLIDUM (Muse. Alleghan., No. 155) has 
narrower leaves, with a looser areolation, the lower areolx not sinuous, the costa 
with ridges only near = piss 3 pedicel pale yellow. — Alleghany Mountains 5 
rare.— The variety i ot mountainons, and very common. (Tab. 
ma, Schwegr. Compactly series stems slender, 
4'—5! long; leaves casa a RR entire, ere ; capsule gibbous- 
BG striate, ann gh peaks of the Alleghany Mesias: north shore 
Lake Superior, yp eailing, 
is. D. € um, Brid. Loosely cxspitose; leaves spreading, snb- 
secund, flexuous, lanceolate-subulate, denticulate at the apex, crisped when dry ; 
costa: strong, pen ips eg oval-oblong, much incurved, striated. — On 
rocks, in mountainous 
is. D. ORES A Stems 3/-4' high; leaves spreading, linear- 
lanceolate, undulated, serrate on the margin and also the back at the apex}; 
costa slender and vanishing below the point; capsule oval-oblong, ssh al in- 
curved, striated ; annulus none. —In cranberry marshes, Northern Ohio. 
quereux. (Eu.) 
20. D. Schraderi, Web. & Mohr. Densely tufted; stems 3’-5! long; 
leaves crowded, erect-patent, oblong-lanceolate, rather obtuse, undulated, the 
upper half serrated on the margins and papillose on the back; costa ceasing 
cree Gee 
